title: Preparation of an imogolite/poly(acrylic acid) hybrid gel.
abstract: Many efforts in the field of hydrogels have been focused toward increasing the mechanical strength of the gel using inorganic materials. In this study, we synthesized a hydrogel that has excellent mechanical properties using surface-modified inorganic nanofibers composed of imogolite (Al2SiO3(OH)4), which is a hydrated aluminum silicate that has a hollow tube structure. Gamma ray radiation generates peroxide radicals on the nanofibers (imogolite), resulting in an additive free hybrid hydrogel. Structural optimization was carried out by changing the composition of imogolite and poly(acrylic acid). Chemical bonding between the nanofiber and the polymer was simulated by a cluster model and characterized by wide area Raman spectroscopy. The results indicate that imogolite embedded in a polymer matrix can align along the direction of an elongational force, as confirmed by small angle X-ray scattering (SAXS).
authors.affiliation: Department of Chemistry and Research Institute for Natural Sciences, Hanyang University, Seoul 133-791, Republic of Korea.
authors.forename: Hoik
authors.initials: H
authors.lastname: Lee
authors.forename: Jungju
authors.initials: J
authors.lastname: Ryu
authors.forename: Donghyun
authors.initials: D
authors.lastname: Kim
authors.forename: Yongho
authors.initials: Y
authors.lastname: Joo
authors.forename: Sang Uck
authors.initials: SU
authors.lastname: Lee
authors.forename: Daewon
authors.initials: D
authors.lastname: Sohn
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000538:Aluminum Silicates / Q000737:chemistry*; D055595:Mechanical Phenomena; D057139:Nanofibers / Q000737:chemistry*; D053838:Scattering, Small Angle; D014961:X-Ray Diffraction
chemical_list: D000180:Acrylic Resins; D000538:Aluminum Silicates; C006903:carbopol 940
keywords: CCD; Hydrogel; Imogolite; Nanocomposite; PAA; Raman spectrum; SAXS; SDD; SLD; UTM; WAI; charge-coupled device; poly(acrylic acid); sample-to-detector; scattering length density; small angle X-ray scattering; universal testing machine; wide area illumination